(Reuters) - People take a dip in a black mud pool at a tourist resort to escape the summer heat in Daying county of Suining, Sichuan province July 4, 2010. China experienced temperatures of over 35 degrees Celsius (95 degrees Fahrenheit) in at least 13 provinces and regions, according to the National Meteorological Center on Sunday. Picture taken July 4, 2010. REUTERS/Stringer (CHINA - Tags: SOCIETY IMAGES OF THE DAY ENVIRONMENT) CHINA OUT. NO COMMERCIAL OR EDITORIAL SALES IN CHINA